JPH10162875A - Terminal metal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate need of caulking work to a wire. SOLUTION: A back end part of a side wall 21 is folded inward to compose a wire holding part 20. A back edge part of the side wall 21 is diagonally protruded forward, and then bent outward, so an elastic piece part 22 and a holding part 22B ate formed, and a tip of the elastic piece part 22 is folded inward to form a crimp blade 23. As a wire crimped by the blade 23 is pulled backward, the elastic piece part 22 is elastically deformed inward about the center of a folded part 22A, so the wire is strongly held by the holding part 22B. Move of the wire can thus be regulated even without caulking the wire by a barrel member or the like, thereby need of caulking work to the barrel member or the like can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called crimping type terminal fitting to which a wire is crimped.

[0002]

2. Description of the Related Art FIG. 4 shows a general pressure contact type terminal fitting. The terminal fitting is provided with a press-contact portion 1 for pressing the core wire of the electric wire W and a barrel portion 2 for fixing the electric wire W. The press contact portion 1 is provided with a pair of press contact blades 3 at the front and rear by bending both front and rear edges of the left and right side plates 5 so as to face inward. Then, when the electric wire W is pushed between the press contact blades 3, the press contact blade 3 cuts into the covering portion of the electric wire W and comes into contact with the core wire. The barrel portion 2 is provided with a barrel piece 4 that projects slightly upward and downward while being slightly shifted back and forth, and by crimping the barrel piece, the electric wire W is fixed to the terminal fitting.

[0003]

However, in the above-mentioned structure, in addition to the press-contact operation of pressing the electric wire to the press-contact blade, the work of caulking the barrel piece must be performed, so that the number of working steps is increased and it is cumbersome. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a terminal fitting capable of eliminating the need for swaging.

[0004]

In order to achieve the above object, a terminal fitting according to the present invention is provided with a press contact portion for cutting into an electric wire covering to establish conduction with a core wire, and an electric wire behind the press contact portion. The rear end portions of the side walls disposed on both sides of the triangular portion are each folded inward into a substantially triangular shape to form an elastic piece portion, and a clamping portion for the electric wire is formed at the top of the triangular portion so as to face each other, Further, the press-contact portion and the elastic piece portion are such that when the press-contact portion is displaced rearward due to an external force acting on the electric wire in a pulling direction, the two clamp portions are displaced in a direction approaching each other in conjunction with the displacement operation. It is characterized by being provided continuously.

According to a second aspect of the present invention, there is provided the terminal fitting according to the first aspect, wherein the press contact portion is integrally extended from a tip end of each elastic piece portion, and these extended end portions are bent in a butt direction. It is characterized in that it has a pair of press contact blades formed and a press contact groove for press-fitting an electric wire is formed between each press contact blade.

According to a third aspect of the present invention, in the terminal fitting according to the second aspect, each of the press contact blades is bent such that an edge on an opposite side projects obliquely in a direction opposite to a direction in which the wire is pulled. It has a special feature.

[0007]

According to the first aspect of the present invention, the terminal of the electric wire is pressed against the press-contact portion. When the electric wire is pulled in this state, the elastic piece portion is elastically deformed inward in conjunction with the movement of the press contact portion. Then, since the holding portions are displaced in a direction approaching each other, the electric wire is held between the holding portions. Thereby, since the movement of the electric wire in the pulling direction can be restricted, it is not necessary to caulk the electric wire with a barrel piece or the like as in the related art, and the work of caulking the barrel piece or the like can be eliminated.

According to the second aspect of the present invention, since the press contact portion is formed by bending the tip of the elastic piece portion, the press contact portion and the elastic piece portion can be integrally connected, and when the electric wire is pulled. Thus, the press contact portion and the elastic piece portion can be reliably linked to each other.

According to the third aspect of the invention, when the electric wires are press-fitted into the press-contact grooves formed between the press-contact blades, each press-contact blade cuts into the electric wire coating and comes into contact with the core wire. When the electric wire is pulled in this state, each press-contact blade bends from the base portion thereof in the direction in which the electric wire is pulled. In this case, according to the third aspect of the present invention, each press-connecting blade is bent so that the edge on the opposite side projects obliquely in the direction opposite to the pulling direction of the electric wire. If it bends in the direction, the space between the press contact blades will be narrowed. Therefore, when the electric wire is pulled, the contact pressure against the core wire can be increased, and the conduction state with the electric wire can be more reliably maintained.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

<First Embodiment> A first embodiment of a terminal fitting according to the present invention will be described below with reference to FIGS. The terminal fitting of this embodiment is a female terminal fitting F, which is formed by bending a conductive metal plate. As shown in FIG. 1, a connecting portion 10 for inserting a mating terminal metal fitting (not shown) is provided on the front side (upper left side in FIG. 1) of the female terminal metal fitting F, and is provided behind (see FIG. 1). An electric wire holding portion 20 for holding the electric wire W in a pressed state is provided in the middle and lower right direction.

The connecting portion 10 is formed in a box shape having an opening on the front side, and an elastic contact piece portion 11 is formed inside the connecting portion 10 so as to be able to come into contact with the terminal fitting on the other side by folding a leading edge. . A lance 12 that engages with a housing (not shown) to prevent the female terminal fitting F from coming off and a stabilizer 13 that guides the female terminal fitting F into the housing are formed on the upper surface of the connection portion 10.

The wire holding portion 20 is formed by folding back the rear end portions of the left and right side walls 21 respectively. Each folded portion (hereinafter referred to as a folded piece portion 24) projects obliquely forward from the rear edge of the side wall 21, then curves outward, and further bends inward after its leading end contacts the side wall 21. Have been. After projecting obliquely forward from the rear edge portion, the outwardly curved portion corresponds to the elastic piece portion 22 of the present invention, and the top (the most protruding inward portion) of the elastic piece portion 22 is the holding portion of the present invention. This corresponds to the part 22B. And
The elastic piece portion 22 is elastically deformable inward around the folded portion 22A (the rear edge of the side wall 21). Also,
The distance between the holding portions 22 </ b> B is set slightly smaller than the outer diameter of the electric wire W, so that the electric wire W is press-fitted between the elastic pieces 22.

The inwardly bent portion at the end of each folded piece 24 forms the press-contact blade 23 of the present invention, and a press-contact groove for press-fitting the electric wire W between the opposing edges of both press-contact blades 23. 23B. This pair of press contact blades 2
3 constitutes the press contact portion 23 of the present invention. And
When the electric wire W is pushed into the press contact groove 23B, each press contact blade 23 cuts into the covering portion of the electric wire W and comes into contact with the core wire. In addition, the upper edge part of the opposing side of each press contact blade 23 is notched obliquely, and forms an electric wire guide portion 23A for guiding the electric wire W to the press contact groove 23B. In addition, each press contact blade 23
Is bent so that the edge on the opposite side faces slightly obliquely forward, and when each press contact blade 23 is pulled backward by the electric wire W, the space between the press contact blades 23, that is, the press contact groove 23B is narrowed. .

Next, the operation of the present embodiment will be described. To connect the electric wire W to the female terminal fitting F, a rear portion thereof is pushed between the elastic pieces 22 while pushing the end of the electric wire W into the press-contact groove 23B. Then, each press contact blade 23 cuts into the sheath of the electric wire W and comes into contact with the core wire, so that conduction between the female terminal fitting F and the electric wire W is achieved. Further, the electric wire W pushed between the elastic pieces 22 is sandwiched by the sandwiching portion 22B. In this state, the electric wire W is pinched by the pinching portion 22B, but not pinched so strongly that its movement can be restricted.

In this state, when the electric wire W is pulled in the direction of the arrow in FIG.
To the right). Then, since each elastic piece 22 is pushed rearward by the pressing blade 23, the elastic piece 22 is elastically deformed inward around the folded portion 22A (see a state shown by a two-dot chain line in FIG. 2). This allows
The holding portions 22B are displaced in directions approaching each other, and the electric wire W is strongly held by the holding portions 22B. Therefore, the movement of the electric wire W in the pulling direction is restricted.

As described above, in the present embodiment, even if the electric wire W is not caulked with a barrel piece or the like, the movement of the electric wire W when it is pulled can be regulated. Therefore, it is not necessary to caulk the electric wire W with a barrel piece or the like, so that caulking work is not required and the working process can be simplified.

In this embodiment, the press contact blade 23 projects obliquely forward, and when the electric wire W is pulled, the press contact blade 2
3 bends rearward from its base. That is, when the electric wire W is pulled, the press contact groove 23B is narrowed. In short, in general, when the electric wire is pulled, the contact pressure between the press contact blade and the core wire acts in a direction to be reduced. However, in the present embodiment, when the electric wire W is pulled, the contact pressure between the press contact blade 23 and the core wire is increased. Thus, the conduction state with the electric wire W can be reliably maintained.

<Second Embodiment> A second embodiment of the present invention will now be described with reference to FIG. The difference between the present embodiment and the first embodiment lies in the configuration of the electric wire holding portion 30. Other portions are the same as those of the first embodiment, and thus the same portions are denoted by the same reference numerals and description thereof will be omitted. .

In the present embodiment, the press contact blades 31 are cut and raised from the left and right side walls 32. Cut and raised press-contact blade 3
Reference numeral 1 projects slightly obliquely forward (to the left in FIG. 3).
Also, between the two press contact blades 31, as in the first embodiment, the press contact grooves 3 are provided.
3 is formed, and when the electric wire W is pushed into it, each press contact blade 31 is formed.
Are cut into the covering portion and come into contact with the core wire.

Similar to the first embodiment, the elastic piece 34 is formed by folding the rear ends (right ends in FIG. 3) of the left and right side walls 32 inward, and extends obliquely forward from the rear edge, and then extends therefrom. , And is bent outward. The distal end of the elastic piece 34 abuts against each of the press contact blades 31 from behind.

After pressing the end of the electric wire W against the press-contact blade 31,
When the electric wire W is pulled in the direction of the arrow in FIG.
Deflects backward from its base. Therefore, since the tip of the elastic piece 34 is pressed by the press contact blade 31, the elastic piece 34 is elastically deformed inward from the folded portion 34A (see the state shown by the two-dot chain line in FIG. 3). . Accordingly, as in the first embodiment, since the electric wire W is strongly pinched by the holding portion 34B, the movement of the electric wire W is restricted.

Also in this embodiment, since the movement of the electric wire W can be regulated without caulking with a barrel piece or the like, it is not necessary to perform a caulking operation on the barrel piece or the like. In addition, each press contact blade 31
Projecting obliquely forward, the press-contact groove 33 can be narrowed when the electric wire W is pulled, so that the first
As in the embodiment, the contact pressure on the core wire can be increased.

The present invention is not limited to the above-described embodiment, but can be modified as follows, for example, and these embodiments also belong to the technical scope of the present invention. (1) In each of the above embodiments, the present invention employs the female terminal fitting F
Although the example applied to (1) was shown, you may apply to a male terminal fitting. In addition, the present invention can be implemented with various modifications without departing from the scope.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the entire first embodiment.

FIG. 2 is a top view showing the electric wire holding unit of the embodiment.

FIG. 3 is a top view illustrating an electric wire holding unit according to a second embodiment.

FIG. 4 is a perspective view showing a conventional example.

[Explanation of symbols]

 21, 32 ... Side wall 22, 34 ... Elastic piece 22B ... Clamping part 23, 31 ... Clamping blade (clamping part) 23B, 33 ... Clamping groove 34B ... Clamping part W: Electric wire F ... Female terminal fitting (terminal fitting)

Continued on the front page (72) Inventor Mitsuru Furuya 1-14 Nishisuehirocho, Yokkaichi-shi, Mie Sumitomo Wiring Systems, Ltd.

Claims (3)

[Claims] 1. A pressure contact portion cut into an electric wire covering for conduction with a core wire is provided. Behind the pressure contact portion, rear end portions of side walls arranged on both sides of the electric wire are respectively folded inward in a substantially triangular shape. The triangular portion is formed with an elastic piece, and a pinching portion for the electric wire is formed on the top of the triangular portion so as to face the electric wire. Further, the press contact portion and the elastic piece portion are configured such that the press contact portion pulls the electric wire. A terminal fitting, which is provided so as to be displaced in a direction approaching each other in conjunction with a displacing operation when an external force acts in the direction and displaces rearward. 2. The terminal fitting according to claim 1, wherein the press contact portion extends integrally from a tip of each of the elastic pieces,
And it has a pair of press contact blades formed by bending these extending end portions in the butting direction, and a press contact groove for press-fitting the electric wire is formed between each press contact blade. Terminal fittings. 3. The terminal fitting according to claim 2, wherein each of the press-contact blades is bent such that an edge on an opposite side projects obliquely in a direction opposite to a pulling direction of the electric wire. Terminal fittings.